From 499beb7344220523e3c070c1f87ad4ee0abb34cf Mon Sep 17 00:00:00 2001
From: Dreamacro <8615343+Dreamacro@users.noreply.github.com>
Date: Wed, 10 Nov 2021 22:19:11 +0800
Subject: [PATCH] Fix: bind iface should throw control error

---
 component/dialer/bind_darwin.go | 13 ++++++++++---
 component/dialer/bind_linux.go  | 11 +++++++++--
 2 files changed, 19 insertions(+), 5 deletions(-)

diff --git a/component/dialer/bind_darwin.go b/component/dialer/bind_darwin.go
index b3ae9d815..bf51b305f 100644
--- a/component/dialer/bind_darwin.go
+++ b/component/dialer/bind_darwin.go
@@ -27,14 +27,21 @@ func bindControl(ifaceIdx int, chain controlFn) controlFn {
 			}
 		}
 
-		return c.Control(func(fd uintptr) {
+		var innerErr error
+		err = c.Control(func(fd uintptr) {
 			switch network {
 			case "tcp4", "udp4":
-				unix.SetsockoptInt(int(fd), unix.IPPROTO_IP, unix.IP_BOUND_IF, ifaceIdx)
+				innerErr = unix.SetsockoptInt(int(fd), unix.IPPROTO_IP, unix.IP_BOUND_IF, ifaceIdx)
 			case "tcp6", "udp6":
-				unix.SetsockoptInt(int(fd), unix.IPPROTO_IPV6, unix.IPV6_BOUND_IF, ifaceIdx)
+				innerErr = unix.SetsockoptInt(int(fd), unix.IPPROTO_IPV6, unix.IPV6_BOUND_IF, ifaceIdx)
 			}
 		})
+
+		if innerErr != nil {
+			err = innerErr
+		}
+
+		return
 	}
 }
 
diff --git a/component/dialer/bind_linux.go b/component/dialer/bind_linux.go
index ae772a71e..97d37cfa6 100644
--- a/component/dialer/bind_linux.go
+++ b/component/dialer/bind_linux.go
@@ -25,9 +25,16 @@ func bindControl(ifaceName string, chain controlFn) controlFn {
 			}
 		}
 
-		return c.Control(func(fd uintptr) {
-			unix.BindToDevice(int(fd), ifaceName)
+		var innerErr error
+		err = c.Control(func(fd uintptr) {
+			innerErr = unix.BindToDevice(int(fd), ifaceName)
 		})
+
+		if innerErr != nil {
+			err = innerErr
+		}
+
+		return
 	}
 }